Haeeis tabor



.(No Model.)

H. TABOR.

METAL FOUNDING MAGHINB.

No.- 347,447. PatentedAug. 17,1836.

lNVE/VYOR A TTORNEY PATENT I Erica,

HARRIS TABOR, OF NEXV YOBKQN. Y., ASSIGNOR TO THE TABOR MANUFAC- TUBING COMPANY, OF SAME PLACE.

METAL-FOUNDING MACHINE.

SPECIPICATIONformingpart of Letters Patent No. 347,447, dated August 17, 1886.

Application filed April 8, 1886.

To all whom it may concern.-

Be it known that I, HARRIS TABOR, of New York, New York county, New York, have invented certain new and useful Improvements 5 in Metal-Founding Machines, of which the following is a specification.

In view of other improvements made by me in metalrfounding machines, I designate this specification as pertaining to Case B.

This invention pertains to improvements in that class of machines which are employed by the metal-founder in ramming and compact ing the sand in his flasks.

The invention relates to improvements in the rammers or pressers of such machines, re-

gardless of the mechanism by which such rammers are actuated.

My improvements will be readily understood from the following description, taken in connection with the accompanying drawings,

in which Figure 1 is a perspective view of a rammer or presser illustrative of my improvements, the rammer being shown in this view as composed of four articulated independent ramming-blocks; and Fig. 2, a plan of a rammer shown as composed of sixteen articulated independent ramming-bloeks, the marginal rammers of the group being arranged to exert a superior ramming-pressure upon the sand upon which they act.

In the drawings, referring forthe present exclusively to Fig.1, A indicates four ramming-blocks disposed in a group, with their 7 5 lower faces arranged in substantially a single plane; B, levers articulated to and connecting the blocks in pairs, there being one of these levers for each pair of blocks employed, 0, the joints of articulation by which the blocks attach to the ends of these levers, these joints being formed in the example of journal-pins engaging the ends of the levers and lugs rising from the tops of the ramming-blocks; D, a lever having its ends articulately attached 5 to the levers B at, in the present example, points midway between the ends of thelev'ers, E, the joints of articulation by which the ends of the lever D attach to the levers B, those joints being formed in the example by means of spheres upon the ends of the lever D, en-

gaging spherical sockets in the levers B F, a

Serial No. 198.298. (No model.)

ramrod articulately attached at a mid-point in the length of the levcrD; G, a ball-and-socket joint serving as the joint of attachment and articulation between the ramrod and the le ver D.

The ramrod F is intended to be reciprocated by any of the mechanisms usually employed in metal-founding machines for actuating the 'rammerand pressing thesame downward upon 6c the sand in the flask. Ordinary metal-foundingmachines generally comprise a flask-supporting table, a rammer-head of some kind, mechanism for elevating and depressing the rammerhead, and a ramrod connecting the rammer-head with such mechanism. In such machines, when my improvements are embodied in them, the group of ram ming-blocks A form the rammer-head, and the operation is conducted as usual-that is, after the flask 0 full of sand is properly placed under the rammer-head the rammer-head is forced down upon the sand by means of the actuating mechanism, whatever such actuating mechanism may be. 7 5

It will be obvious from the construction shown and described in connection with Fig. 1 that when downward pressure is exerted upon the ramrod the group of blocks will be pushed downward with equal force, and will remain in a common plane, if the resistance offered to the sand beneath the blocks be equal under all of the blocks; but if one of the blocks meets with a superior resistance that block will lag behind the other blocks of the group, and that each of the blocks of the group is thus at liberty to take a position in an independent plane while exerting an equal downward pressure upon the same. I am thus enabled, in exerting a downward pressure upon a single ramrod, to effect a-substantially-uniform ramming of the body of the sand presenting inequalities of resistance due to varying depths of sand, or to inequalities in pattern-surface. The dimensions of the group of blocks may be 5 such as to substantially conform to the size of the flask in hand, and the entire group may be removed from the ramrod and groups of other size substituted.

I have thus far only referred to Fig. 1 of the 10:)

drawings, in which the rammer is composed of but four blocks. The principle of construction may, however, be carried to an unlimited extent, so far as the number of blocks in the group is concerned. Thus in Fig. 2 11 show a group of sixteen blocks. In this group the blocks are united artieulately in pairs by the lovers l3. and the pairs are again articulately united by the levers D. These levers are again united by levers ll', embodying the same principle of construction and operation as the le ver D, and the levers 11 are connected in pairs by the lever L, constructed and operating up on the same principle, and at the center of this last lever the ramred F is artieulately attached. It will thus be seen that any number of blocks may be actuated by a single ramrod, and exert a substiantially-uniform pressure upon the body of sand beneath them, and at the same time permit the blocks to accommodate themselves to inequalities of sand and of patternsurface.

I have found by experience with sand-ramming machinery that the walls of the flask offer considerable resistance to the downward movement of the sand which is contiguous to these walls, and I have found it highly advantageous to provide for meeting this increased resistance by means which will exert a superior ramming-power upon the sand which is near the walls of the flask. In a group of four blocks all the blocks are of course marginal blocks-as, for instance, in Fig. 2 there are four inner blocks, J, surrounded by the other bloel;s,whieh form the marginal blocks of the group. The parts as shown in Fig. 2 are so arranged as to endow the marginal blocks of the group with a rannning-power superior to that of theinuer blocks, J. 'lhisis effected by lengthening the inner ends of such of the le vers 13 as engage the inner blocks. Thus in Fig. 2, K indicates the inner ends of such of the levers 13 as engage the inner blocks, J. It will be observed that the inner ends of these lovers are ofgreater length than the outer ends, whereby the blocks attached to the inner ends I are susceptible of yielding upwardly more readily than the blocks attached to the outer ends. Itollowing outthis principle ofconstruetion, I am enabled to endow any particular block or blocks of the group with a rammingpower either superior or inferior to the ranr tiling-power of the other blocks of the group.

In the illustration I show the separate blocks as having equal ramming-area; but in practice I may vary thefacial areas ofsome of the blocks of the group and employ such unequal-sized blocks in connection either with equal or unequal levers.

l'faving thus described my invention and explained the principle thereofand the best man ner in which I contemplateapplying that p rin ciple, I now proceed to distinctly point out and claim the new and original features.

I claim as my invention 1. In metal-founding machines, a rammer composed ofa group of blocks, in combination with levers articulately attached to and uniting the blocks in pairs, a. lever articulately at tached to and uniting such tirstanentioned levers, and a ramrod arranged, substantially as set forth, to transmit pressure to said lastmentioucd lever.

2. In metal-founding machines, a rannner composed of a group of marginal and interior blocks, in combination with levers artieulately attached to and uniting the blocks in pairs, the ends of such levers which attach to the inner blocks of the groups being of greater length than the ends which attach to' the marginal bloclt's of the groups, levers artieulately attached to and uniting said first-mentioned levers in pairs, and a ramrod arranged, substantially as set forth, to transmit pressure to said last-mentioned levers.

l [Alt]? IS TABOR.

\Vitnesses:

R. l6. UrasunmJ, S. D. humans. 

